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1.
1. pronunciation of "retarded" attributed to residents of the Boston area

2. stupid, silly, asinine, pointless; devoid of logic, substance, and/or justification (this usage should not be confused with "retarded")

3. adjective used to describe anyone who does not find janet reno sexually attractive
This war is wicked retahded.
by no war April 29, 2003
 
2.
An adjective commonly used in Toronto Canada's east end to describe a female as extremely good-looking. The phrase, originally known as "retarded-hot", was created to differentiate between a girl who was merely attractive, to one who was "ridiculously good-looking". After a few months the word "hot" was dropped and it is speculated the pronunciation of "retarded" was changed due to the originators of this term being big Saturday Night Live fans.
"Hey Jordo, tell me about that chick you met last night, was she hot?"

"She's retahded"
by D-Roach April 18, 2008